linux-kernel - [PATCH 3/3] pinctrl: single: unify pinconf offset mapping with pinmux

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Message-ID: <20251222-upstream_pinctrl_single-v1-3-e4aaa4eeb936@aspeedtech.com>
Date: Mon, 22 Dec 2025 20:04:28 +0800
From: Billy Tsai <billy_tsai@...eedtech.com>
To: Tony Lindgren <tony@...mide.com>, Haojian Zhuang
	<haojian.zhuang@...aro.org>, Linus Walleij <linusw@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
	<linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<andrew@...econstruct.com.au>, <BMC-SW@...eedtech.com>, Billy Tsai
	<billy_tsai@...eedtech.com>
Subject: [PATCH 3/3] pinctrl: single: unify pinconf offset mapping with
 pinmux

Use the same register offset calculation for pinconf as pinmux to
properly handle bit-per-mux configurations. Ensures consistent and
correct offset mapping for pin configuration operations.

Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 drivers/pinctrl/pinctrl-single.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index e65ae737b4c5..aaf830315c5d 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -505,7 +505,8 @@ static int pcs_pinconf_get(struct pinctrl_dev *pctldev,
 			continue;
 		}
 
-		offset = pin * (pcs->width / BITS_PER_BYTE);
+		/* Use the same offset mapping as pinmux (handles bit-per-mux) */
+		offset = pcs_pin_reg_offset_get(pcs, pin);
 		data = pcs->read(pcs->base + offset) & func->conf[i].mask;
 		switch (func->conf[i].param) {
 		/* 4 parameters */
@@ -573,7 +574,8 @@ static int pcs_pinconf_set(struct pinctrl_dev *pctldev,
 			if (param != func->conf[i].param)
 				continue;
 
-			offset = pin * (pcs->width / BITS_PER_BYTE);
+			/* Use the same offset mapping as pinmux (handles bit-per-mux) */
+			offset = pcs_pin_reg_offset_get(pcs, pin);
 			data = pcs->read(pcs->base + offset);
 			arg = pinconf_to_config_argument(configs[j]);
 			switch (param) {

-- 
2.34.1